mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/vc1: Check for excessive resolution
Fixes: overflow in aspect ratio calculation Fixes: signed integer overflow: 393215 * 14594 cannot be represented in type 'int' Fixes: 15728/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV3IMAGE_fuzzer-5661588893204480 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -451,7 +451,11 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
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h = get_bits(gb, 8) + 1;
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v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
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} else {
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av_reduce(&v->s.avctx->sample_aspect_ratio.num,
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if (v->s.avctx->width > v->max_coded_width ||
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v->s.avctx->height > v->max_coded_height) {
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avpriv_request_sample(v->s.avctx, "Huge resolution");
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} else
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av_reduce(&v->s.avctx->sample_aspect_ratio.num,
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&v->s.avctx->sample_aspect_ratio.den,
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v->s.avctx->height * w,
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v->s.avctx->width * h,
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